Revert "Temporarily direct documentation to dev"

This reverts commit cdd605a.

Author: timholy

README.md

@@ -1,6 +1,6 @@
 # MethodAnalysis
 
-[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://timholy.github.io/MethodAnalysis.jl/dev)
+[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://timholy.github.io/MethodAnalysis.jl/stable)
 [![Build Status](https://travis-ci.com/timholy/MethodAnalysis.jl.svg?branch=master)](https://travis-ci.com/timholy/MethodAnalysis.jl)
 [![Codecov](https://codecov.io/gh/timholy/MethodAnalysis.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/timholy/MethodAnalysis.jl)